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apache / dubbo

The java implementation of Apache Dubbo. An RPC and microservice framework.
https://dubbo.apache.org/
Apache License 2.0
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cluster = ClusterRules.FAIL_BACK出现java.lang.NullPointerException .GroupServiceKeyCache.getServiceKey()异常。 #8431

Closed startjava closed 3 years ago

startjava commented 3 years ago

提供者代码： @DubboService public class HelloService1 implements IService1 { @Value("${server.port}") private int portValue;

@Override
public String getHello(String username) {
    System.out.println("HelloService1 portValue=" + portValue);
    try {
        if (portValue == 8085) {
            Thread.sleep(10000);
        }
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    return "hello1 " + username + " port=" + portValue;
}

}

消费者代码： @RestController public class TestCcontroller { @DubboReference(cluster = ClusterRules.FAIL_BACK) private IService1 service1;

@RequestMapping("Test1")
public String test1() {
    String helloString = service1.getHello("中国人1");
    System.out.println("public String test1() " + helloString);
    return "返回信息：" + helloString;
}

}

消费者执行后出现如下异常： 2021-08-05 21:39:20.298 ERROR 25224 --- [nio-8088-exec-3] o.a.d.r.c.s.FailbackClusterInvoker : [DUBBO] Failback to invoke method getHello, wait for retry in background. Ignored exception: Invoke remote method timeout. method: getHello, provider: DefaultServiceInstance{, serviceName='my-fault-tolerant-provider-8085', host='192.168.56.1', port=20880, enabled=true, healthy=true, metadata={side=provider, methods=getHello, release=3.0.1, deprecated=false, dubbo=2.0.2, dubbo.metadata.revision=b90aba7582ee3530cdc429b656e47e26, pid=26292, dubbo.metadata.storage-type=local, interface=com.ghy.www.api.IService1, generic=false, dubbo.metadata-service.url-params={"version":"1.0.0","dubbo":"2.0.2","release":"3.0.1","port":"20880","protocol":"dubbo"}, metadata-type=remote, application=my-fault-tolerant-provider-8085, dubbo.endpoints=[{"port":20880,"protocol":"dubbo"}], dynamic=true, anyhost=true, timestamp=1628170651656}}, service{name='com.ghy.www.api.IService1',group='null',version='null',protocol='dubbo',params={side=provider, release=3.0.1, methods=getHello, deprecated=false, dubbo=2.0.2, pid=26292, interface=com.ghy.www.api.IService1, generic=false, metadata-type=remote, application=my-fault-tolerant-provider-8085, dynamic=true, anyhost=true, timestamp=1628170651656},consumerParams={cluster=failback, side=consumer, register.ip=192.168.56.1, release=3.0.1, methods=getHello, dubbo=2.0.2, pid=25224, interface=com.ghy.www.api.IService1, qos.enable=false, metadata-type=remote, application=my-fault-tolerant-consumer-failback, sticky=false, timestamp=1628170693311}}, cause: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2021-08-05 21:39:19.273, end time: 2021-08-05 21:39:20.292, client elapsed: 1 ms, server elapsed: 1018 ms, timeout: 1000 ms, request: Request [id=6, version=2.0.2, twoway=true, event=false, broken=false, data=null], channel: /192.168.56.1:10780 -> /192.168.56.1:20880, , dubbo version: 3.0.1, current host: 192.168.56.1

org.apache.dubbo.rpc.RpcException: Invoke remote method timeout. method: getHello, provider: DefaultServiceInstance{, serviceName='my-fault-tolerant-provider-8085', host='192.168.56.1', port=20880, enabled=true, healthy=true, metadata={side=provider, methods=getHello, release=3.0.1, deprecated=false, dubbo=2.0.2, dubbo.metadata.revision=b90aba7582ee3530cdc429b656e47e26, pid=26292, dubbo.metadata.storage-type=local, interface=com.ghy.www.api.IService1, generic=false, dubbo.metadata-service.url-params={"version":"1.0.0","dubbo":"2.0.2","release":"3.0.1","port":"20880","protocol":"dubbo"}, metadata-type=remote, application=my-fault-tolerant-provider-8085, dubbo.endpoints=[{"port":20880,"protocol":"dubbo"}], dynamic=true, anyhost=true, timestamp=1628170651656}}, service{name='com.ghy.www.api.IService1',group='null',version='null',protocol='dubbo',params={side=provider, release=3.0.1, methods=getHello, deprecated=false, dubbo=2.0.2, pid=26292, interface=com.ghy.www.api.IService1, generic=false, metadata-type=remote, application=my-fault-tolerant-provider-8085, dynamic=true, anyhost=true, timestamp=1628170651656},consumerParams={cluster=failback, side=consumer, register.ip=192.168.56.1, release=3.0.1, methods=getHello, dubbo=2.0.2, pid=25224, interface=com.ghy.www.api.IService1, qos.enable=false, metadata-type=remote, application=my-fault-tolerant-consumer-failback, sticky=false, timestamp=1628170693311}}, cause: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2021-08-05 21:39:19.273, end time: 2021-08-05 21:39:20.292, client elapsed: 1 ms, server elapsed: 1018 ms, timeout: 1000 ms, request: Request [id=6, version=2.0.2, twoway=true, event=false, broken=false, data=null], channel: /192.168.56.1:10780 -> /192.168.56.1:20880 at org.apache.dubbo.rpc.protocol.AbstractInvoker.waitForResultIfSync(AbstractInvoker.java:280) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.protocol.AbstractInvoker.invoke(AbstractInvoker.java:181) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:78) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invokeWithContext(AbstractClusterInvoker.java:297) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.cluster.support.FailbackClusterInvoker.doInvoke(FailbackClusterInvoker.java:101) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:265) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:89) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$FilterChainNode.invoke(FilterChainBuilder.java:82) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.protocol.dubbo.filter.FutureFilter.invoke(FutureFilter.java:51) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$FilterChainNode.invoke(FilterChainBuilder.java:82) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.cluster.filter.support.ConsumerContextFilter.invoke(ConsumerContextFilter.java:101) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$FilterChainNode.invoke(FilterChainBuilder.java:82) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.cluster.support.wrapper.AbstractCluster$ClusterFilterInvoker.invoke(AbstractCluster.java:93) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:93) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.registry.client.migration.MigrationInvoker.invoke(MigrationInvoker.java:276) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:95) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.common.bytecode.proxy1.getHello(proxy1.java) ~[dubbo-3.0.1.jar:3.0.1] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na] at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.3.9.jar:5.3.9] at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208) ~[spring-aop-5.3.9.jar:5.3.9] at com.sun.proxy.$Proxy62.getHello(Unknown Source) ~[na:na] at com.ghy.www.controller.TestCcontroller.test1(TestCcontroller.java:16) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.9.jar:5.3.9] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.9.jar:5.3.9] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.9.jar:5.3.9] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.9.jar:5.3.9] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.9.jar:5.3.9] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.9.jar:5.3.9] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1064) ~[spring-webmvc-5.3.9.jar:5.3.9] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.9.jar:5.3.9] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.9.jar:5.3.9] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.9.jar:5.3.9] at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.50.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.9.jar:5.3.9] at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.50.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:228) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.50.jar:9.0.50] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.9.jar:5.3.9] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.9.jar:5.3.9] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.9.jar:5.3.9] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.9.jar:5.3.9] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.9.jar:5.3.9] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.9.jar:5.3.9] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.50.jar:9.0.50] at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na] Caused by: java.util.concurrent.ExecutionException: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2021-08-05 21:39:19.273, end time: 2021-08-05 21:39:20.292, client elapsed: 1 ms, server elapsed: 1018 ms, timeout: 1000 ms, request: Request [id=6, version=2.0.2, twoway=true, event=false, broken=false, data=null], channel: /192.168.56.1:10780 -> /192.168.56.1:20880 at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:395) ~[na:na] at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2086) ~[na:na] at org.apache.dubbo.rpc.AsyncRpcResult.get(AsyncRpcResult.java:181) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.protocol.AbstractInvoker.waitForResultIfSync(AbstractInvoker.java:272) ~[dubbo-3.0.1.jar:3.0.1] ... 74 common frames omitted Caused by: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2021-08-05 21:39:19.273, end time: 2021-08-05 21:39:20.292, client elapsed: 1 ms, server elapsed: 1018 ms, timeout: 1000 ms, request: Request [id=6, version=2.0.2, twoway=true, event=false, broken=false, data=null], channel: /192.168.56.1:10780 -> /192.168.56.1:20880 at org.apache.dubbo.remoting.exchange.support.DefaultFuture.doReceived(DefaultFuture.java:210) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:175) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.remoting.exchange.support.DefaultFuture$TimeoutCheckTask.notifyTimeout(DefaultFuture.java:298) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.remoting.exchange.support.DefaultFuture$TimeoutCheckTask.lambda$run$0(DefaultFuture.java:285) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.common.threadpool.ThreadlessExecutor$RunnableWrapper.run(ThreadlessExecutor.java:196) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.common.threadpool.ThreadlessExecutor.waitAndDrain(ThreadlessExecutor.java:99) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.rpc.AsyncRpcResult.get(AsyncRpcResult.java:179) ~[dubbo-3.0.1.jar:3.0.1] ... 75 common frames omitted

public String test1() null 2021-08-05 21:39:26.304 ERROR 25224 --- [-timer-thread-1] o.a.d.r.c.s.FailbackClusterInvoker : [DUBBO] Failed retry to invoke method getHello, waiting again., dubbo version: 3.0.1, current host: 192.168.56.1

org.apache.dubbo.rpc.RpcException: Failed to invoke remote method: getHello, provider: DefaultServiceInstance{, serviceName='my-fault-tolerant-provider-8086', host='192.168.56.1', port=20881, enabled=true, healthy=true, metadata={side=provider, methods=getHello, release=3.0.1, deprecated=false, dubbo=2.0.2, dubbo.metadata.revision=5d116ec4c7f71ebeec3cc2b81ce491a6, pid=29536, dubbo.metadata.storage-type=local, interface=com.ghy.www.api.IService1, generic=false, dubbo.metadata-service.url-params={"version":"1.0.0","dubbo":"2.0.2","release":"3.0.1","port":"20881","protocol":"dubbo"}, metadata-type=remote, application=my-fault-tolerant-provider-8086, dubbo.endpoints=[{"port":20881,"protocol":"dubbo"}], dynamic=true, anyhost=true, timestamp=1628170657112}}, cause: org.apache.dubbo.remoting.RemotingException: Fail to decode request due to: java.lang.NullPointerException java.lang.NullPointerException at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936) at org.apache.dubbo.rpc.support.GroupServiceKeyCache.getServiceKey(GroupServiceKeyCache.java:37) at org.apache.dubbo.rpc.support.ProtocolUtils.serviceKey(ProtocolUtils.java:51) at org.apache.dubbo.rpc.protocol.AbstractProtocol.serviceKey(AbstractProtocol.java:62) at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.getInvoker(DubboProtocol.java:256) at org.apache.dubbo.rpc.protocol.dubbo.CallbackServiceCodec.decodeInvocationArgument(CallbackServiceCodec.java:292) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:177) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:83) at org.apache.dubbo.remoting.transport.DecodeHandler.decode(DecodeHandler.java:57) at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:44) at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) at java.base/java.lang.Thread.run(Thread.java:832)

at org.apache.dubbo.rpc.protocol.AbstractInvoker.waitForResultIfSync(AbstractInvoker.java:283) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.protocol.AbstractInvoker.invoke(AbstractInvoker.java:181) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:78) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invokeWithContext(AbstractClusterInvoker.java:297) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.cluster.support.FailbackClusterInvoker$RetryTimerTask.run(FailbackClusterInvoker.java:144) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.timer.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:648) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.timer.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:727) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.timer.HashedWheelTimer$Worker.run(HashedWheelTimer.java:449) ~[dubbo-3.0.1.jar:3.0.1]
at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na]

Caused by: java.util.concurrent.ExecutionException: org.apache.dubbo.remoting.RemotingException: Fail to decode request due to: java.lang.NullPointerException java.lang.NullPointerException at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936) at org.apache.dubbo.rpc.support.GroupServiceKeyCache.getServiceKey(GroupServiceKeyCache.java:37) at org.apache.dubbo.rpc.support.ProtocolUtils.serviceKey(ProtocolUtils.java:51) at org.apache.dubbo.rpc.protocol.AbstractProtocol.serviceKey(AbstractProtocol.java:62) at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.getInvoker(DubboProtocol.java:256) at org.apache.dubbo.rpc.protocol.dubbo.CallbackServiceCodec.decodeInvocationArgument(CallbackServiceCodec.java:292) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:177) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:83) at org.apache.dubbo.remoting.transport.DecodeHandler.decode(DecodeHandler.java:57) at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:44) at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) at java.base/java.lang.Thread.run(Thread.java:832)

at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:395) ~[na:na]
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2086) ~[na:na]
at org.apache.dubbo.rpc.AsyncRpcResult.get(AsyncRpcResult.java:181) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.protocol.AbstractInvoker.waitForResultIfSync(AbstractInvoker.java:272) ~[dubbo-3.0.1.jar:3.0.1]
... 8 common frames omitted

Caused by: org.apache.dubbo.remoting.RemotingException: Fail to decode request due to: java.lang.NullPointerException java.lang.NullPointerException at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936) at org.apache.dubbo.rpc.support.GroupServiceKeyCache.getServiceKey(GroupServiceKeyCache.java:37) at org.apache.dubbo.rpc.support.ProtocolUtils.serviceKey(ProtocolUtils.java:51) at org.apache.dubbo.rpc.protocol.AbstractProtocol.serviceKey(AbstractProtocol.java:62) at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.getInvoker(DubboProtocol.java:256) at org.apache.dubbo.rpc.protocol.dubbo.CallbackServiceCodec.decodeInvocationArgument(CallbackServiceCodec.java:292) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:177) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:83) at org.apache.dubbo.remoting.transport.DecodeHandler.decode(DecodeHandler.java:57) at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:44) at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) at java.base/java.lang.Thread.run(Thread.java:832)

at org.apache.dubbo.remoting.exchange.support.DefaultFuture.doReceived(DefaultFuture.java:212) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:175) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:163) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleResponse(HeaderExchangeHandler.java:60) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:181) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:51) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.threadpool.ThreadlessExecutor$RunnableWrapper.run(ThreadlessExecutor.java:196) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.threadpool.ThreadlessExecutor.waitAndDrain(ThreadlessExecutor.java:99) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.AsyncRpcResult.get(AsyncRpcResult.java:179) ~[dubbo-3.0.1.jar:3.0.1]
... 9 common frames omitted

2021-08-05 21:39:29.277 WARN 25224 --- [andler-thread-2] o.a.d.r.p.dubbo.DecodeableRpcResult : [DUBBO] Decode rpc result failed: null, dubbo version: 3.0.1, current host: 192.168.56.1

java.lang.NullPointerException: null at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcResult.decode(DecodeableRpcResult.java:122) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.remoting.transport.DecodeHandler.decode(DecodeHandler.java:57) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:48) ~[dubbo-3.0.1.jar:3.0.1] at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) ~[dubbo-3.0.1.jar:3.0.1] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[na:na] at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) ~[dubbo-3.0.1.jar:3.0.1] at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na]

2021-08-05 21:39:29.278 WARN 25224 --- [andler-thread-2] o.a.d.r.exchange.support.DefaultFuture : [DUBBO] The timeout response finally returned at 2021-08-05 21:39:29.278, response status is 90, channel: /192.168.56.1:10780 -> /192.168.56.1:20880, please check provider side for detailed result., dubbo version: 3.0.1, current host: 192.168.56.1 2021-08-05 21:39:32.306 ERROR 25224 --- [-timer-thread-1] o.a.d.r.c.s.FailbackClusterInvoker : [DUBBO] Failed retry to invoke method getHello, waiting again., dubbo version: 3.0.1, current host: 192.168.56.1

org.apache.dubbo.rpc.RpcException: Failed to invoke remote method: getHello, provider: DefaultServiceInstance{, serviceName='my-fault-tolerant-provider-8085', host='192.168.56.1', port=20880, enabled=true, healthy=true, metadata={side=provider, methods=getHello, release=3.0.1, deprecated=false, dubbo=2.0.2, dubbo.metadata.revision=b90aba7582ee3530cdc429b656e47e26, pid=26292, dubbo.metadata.storage-type=local, interface=com.ghy.www.api.IService1, generic=false, dubbo.metadata-service.url-params={"version":"1.0.0","dubbo":"2.0.2","release":"3.0.1","port":"20880","protocol":"dubbo"}, metadata-type=remote, application=my-fault-tolerant-provider-8085, dubbo.endpoints=[{"port":20880,"protocol":"dubbo"}], dynamic=true, anyhost=true, timestamp=1628170651656}}, cause: org.apache.dubbo.remoting.RemotingException: Fail to decode request due to: java.lang.NullPointerException java.lang.NullPointerException at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936) at org.apache.dubbo.rpc.support.GroupServiceKeyCache.getServiceKey(GroupServiceKeyCache.java:37) at org.apache.dubbo.rpc.support.ProtocolUtils.serviceKey(ProtocolUtils.java:51) at org.apache.dubbo.rpc.protocol.AbstractProtocol.serviceKey(AbstractProtocol.java:62) at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.getInvoker(DubboProtocol.java:256) at org.apache.dubbo.rpc.protocol.dubbo.CallbackServiceCodec.decodeInvocationArgument(CallbackServiceCodec.java:292) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:177) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:83) at org.apache.dubbo.remoting.transport.DecodeHandler.decode(DecodeHandler.java:57) at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:44) at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) at java.base/java.lang.Thread.run(Thread.java:832)

at org.apache.dubbo.rpc.protocol.AbstractInvoker.waitForResultIfSync(AbstractInvoker.java:283) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.protocol.AbstractInvoker.invoke(AbstractInvoker.java:181) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:78) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invokeWithContext(AbstractClusterInvoker.java:297) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.cluster.support.FailbackClusterInvoker$RetryTimerTask.run(FailbackClusterInvoker.java:144) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.timer.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:648) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.timer.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:727) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.timer.HashedWheelTimer$Worker.run(HashedWheelTimer.java:449) ~[dubbo-3.0.1.jar:3.0.1]
at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na]

Caused by: java.util.concurrent.ExecutionException: org.apache.dubbo.remoting.RemotingException: Fail to decode request due to: java.lang.NullPointerException java.lang.NullPointerException at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936) at org.apache.dubbo.rpc.support.GroupServiceKeyCache.getServiceKey(GroupServiceKeyCache.java:37) at org.apache.dubbo.rpc.support.ProtocolUtils.serviceKey(ProtocolUtils.java:51) at org.apache.dubbo.rpc.protocol.AbstractProtocol.serviceKey(AbstractProtocol.java:62) at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.getInvoker(DubboProtocol.java:256) at org.apache.dubbo.rpc.protocol.dubbo.CallbackServiceCodec.decodeInvocationArgument(CallbackServiceCodec.java:292) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:177) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:83) at org.apache.dubbo.remoting.transport.DecodeHandler.decode(DecodeHandler.java:57) at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:44) at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) at java.base/java.lang.Thread.run(Thread.java:832)

at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:395) ~[na:na]
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2086) ~[na:na]
at org.apache.dubbo.rpc.AsyncRpcResult.get(AsyncRpcResult.java:181) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.protocol.AbstractInvoker.waitForResultIfSync(AbstractInvoker.java:272) ~[dubbo-3.0.1.jar:3.0.1]
... 8 common frames omitted

Caused by: org.apache.dubbo.remoting.RemotingException: Fail to decode request due to: java.lang.NullPointerException java.lang.NullPointerException at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936) at org.apache.dubbo.rpc.support.GroupServiceKeyCache.getServiceKey(GroupServiceKeyCache.java:37) at org.apache.dubbo.rpc.support.ProtocolUtils.serviceKey(ProtocolUtils.java:51) at org.apache.dubbo.rpc.protocol.AbstractProtocol.serviceKey(AbstractProtocol.java:62) at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.getInvoker(DubboProtocol.java:256) at org.apache.dubbo.rpc.protocol.dubbo.CallbackServiceCodec.decodeInvocationArgument(CallbackServiceCodec.java:292) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:177) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:83) at org.apache.dubbo.remoting.transport.DecodeHandler.decode(DecodeHandler.java:57) at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:44) at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) at java.base/java.lang.Thread.run(Thread.java:832)

at org.apache.dubbo.remoting.exchange.support.DefaultFuture.doReceived(DefaultFuture.java:212) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:175) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:163) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleResponse(HeaderExchangeHandler.java:60) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:181) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:51) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.threadpool.ThreadlessExecutor$RunnableWrapper.run(ThreadlessExecutor.java:196) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.threadpool.ThreadlessExecutor.waitAndDrain(ThreadlessExecutor.java:99) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.AsyncRpcResult.get(AsyncRpcResult.java:179) ~[dubbo-3.0.1.jar:3.0.1]
... 9 common frames omitted

2021-08-05 21:39:38.304 ERROR 25224 --- [-timer-thread-1] o.a.d.r.c.s.FailbackClusterInvoker : [DUBBO] Failed retry to invoke method getHello, waiting again., dubbo version: 3.0.1, current host: 192.168.56.1

org.apache.dubbo.rpc.RpcException: Failed to invoke remote method: getHello, provider: DefaultServiceInstance{, serviceName='my-fault-tolerant-provider-8086', host='192.168.56.1', port=20881, enabled=true, healthy=true, metadata={side=provider, methods=getHello, release=3.0.1, deprecated=false, dubbo=2.0.2, dubbo.metadata.revision=5d116ec4c7f71ebeec3cc2b81ce491a6, pid=29536, dubbo.metadata.storage-type=local, interface=com.ghy.www.api.IService1, generic=false, dubbo.metadata-service.url-params={"version":"1.0.0","dubbo":"2.0.2","release":"3.0.1","port":"20881","protocol":"dubbo"}, metadata-type=remote, application=my-fault-tolerant-provider-8086, dubbo.endpoints=[{"port":20881,"protocol":"dubbo"}], dynamic=true, anyhost=true, timestamp=1628170657112}}, cause: org.apache.dubbo.remoting.RemotingException: Fail to decode request due to: java.lang.NullPointerException java.lang.NullPointerException at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936) at org.apache.dubbo.rpc.support.GroupServiceKeyCache.getServiceKey(GroupServiceKeyCache.java:37) at org.apache.dubbo.rpc.support.ProtocolUtils.serviceKey(ProtocolUtils.java:51) at org.apache.dubbo.rpc.protocol.AbstractProtocol.serviceKey(AbstractProtocol.java:62) at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.getInvoker(DubboProtocol.java:256) at org.apache.dubbo.rpc.protocol.dubbo.CallbackServiceCodec.decodeInvocationArgument(CallbackServiceCodec.java:292) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:177) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:83) at org.apache.dubbo.remoting.transport.DecodeHandler.decode(DecodeHandler.java:57) at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:44) at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) at java.base/java.lang.Thread.run(Thread.java:832)

at org.apache.dubbo.rpc.protocol.AbstractInvoker.waitForResultIfSync(AbstractInvoker.java:283) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.protocol.AbstractInvoker.invoke(AbstractInvoker.java:181) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:78) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invokeWithContext(AbstractClusterInvoker.java:297) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.cluster.support.FailbackClusterInvoker$RetryTimerTask.run(FailbackClusterInvoker.java:144) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.timer.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:648) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.timer.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:727) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.timer.HashedWheelTimer$Worker.run(HashedWheelTimer.java:449) ~[dubbo-3.0.1.jar:3.0.1]
at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na]

Caused by: java.util.concurrent.ExecutionException: org.apache.dubbo.remoting.RemotingException: Fail to decode request due to: java.lang.NullPointerException java.lang.NullPointerException at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936) at org.apache.dubbo.rpc.support.GroupServiceKeyCache.getServiceKey(GroupServiceKeyCache.java:37) at org.apache.dubbo.rpc.support.ProtocolUtils.serviceKey(ProtocolUtils.java:51) at org.apache.dubbo.rpc.protocol.AbstractProtocol.serviceKey(AbstractProtocol.java:62) at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.getInvoker(DubboProtocol.java:256) at org.apache.dubbo.rpc.protocol.dubbo.CallbackServiceCodec.decodeInvocationArgument(CallbackServiceCodec.java:292) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:177) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:83) at org.apache.dubbo.remoting.transport.DecodeHandler.decode(DecodeHandler.java:57) at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:44) at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) at java.base/java.lang.Thread.run(Thread.java:832)

at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:395) ~[na:na]
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2086) ~[na:na]
at org.apache.dubbo.rpc.AsyncRpcResult.get(AsyncRpcResult.java:181) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.protocol.AbstractInvoker.waitForResultIfSync(AbstractInvoker.java:272) ~[dubbo-3.0.1.jar:3.0.1]
... 8 common frames omitted

Caused by: org.apache.dubbo.remoting.RemotingException: Fail to decode request due to: java.lang.NullPointerException java.lang.NullPointerException at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936) at org.apache.dubbo.rpc.support.GroupServiceKeyCache.getServiceKey(GroupServiceKeyCache.java:37) at org.apache.dubbo.rpc.support.ProtocolUtils.serviceKey(ProtocolUtils.java:51) at org.apache.dubbo.rpc.protocol.AbstractProtocol.serviceKey(AbstractProtocol.java:62) at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.getInvoker(DubboProtocol.java:256) at org.apache.dubbo.rpc.protocol.dubbo.CallbackServiceCodec.decodeInvocationArgument(CallbackServiceCodec.java:292) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:177) at org.apache.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:83) at org.apache.dubbo.remoting.transport.DecodeHandler.decode(DecodeHandler.java:57) at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:44) at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) at org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41) at java.base/java.lang.Thread.run(Thread.java:832)

at org.apache.dubbo.remoting.exchange.support.DefaultFuture.doReceived(DefaultFuture.java:212) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:175) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:163) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleResponse(HeaderExchangeHandler.java:60) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:181) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:51) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.threadpool.ThreadlessExecutor$RunnableWrapper.run(ThreadlessExecutor.java:196) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.common.threadpool.ThreadlessExecutor.waitAndDrain(ThreadlessExecutor.java:99) ~[dubbo-3.0.1.jar:3.0.1]
at org.apache.dubbo.rpc.AsyncRpcResult.get(AsyncRpcResult.java:179) ~[dubbo-3.0.1.jar:3.0.1]
... 9 common frames omitted

2021-08-05 21:39:38.304 ERROR 25224 --- [-timer-thread-1] o.a.d.r.c.s.FailbackClusterInvoker : [DUBBO] Failed retry times exceed threshold (3), We have to abandon, invocation->RpcInvocation [methodName=getHello, parameterTypes=[class java.lang.String], arguments=[中国人1], attachments={remote.application=my-fault-tolerant-consumer-failback, interface=com.ghy.www.api.IService1, path=null, version=0.0.0}], dubbo version: 3.0.1, current host: 192.168.56.1

不知道是不是bug，，总感觉不应该出现这样的问题。

BurningCN commented 3 years ago

你这是调用超时了吧，默认超时时间1s，你服务端睡了10s

startjava commented 3 years ago

故意测试超时啊  网络上很容易超时  但是出现的错误却不应该这样   我感觉是bug  

发自我的iPhone

------------------ 原始邮件 ------------------ 发件人: 灼华 @.> 发送时间: 2021年8月6日 10:55 收件人: apache/dubbo @.> 抄送: startjava @.>, Author @.> 主题: 回复：[apache/dubbo] cluster = ClusterRules.FAIL_BACK出现java.lang.NullPointerException .GroupServiceKeyCache.getServiceKey()异常。 (#8431)

你这是调用超时了吧，默认超时时间1s，你服务端睡了10s

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startjava commented 3 years ago

出错提示说从Map中取得结果是空指定异常，，这样的异常估计是dubbo内部源代码的逻辑bug造成的， 奇怪的是在idea中在getServiceKey()方法设置断点却断不下来。！

------------------ 原始邮件 ------------------ 发件人: "一直以来" @.>; 发送时间: 2021年8月6日(星期五) 中午11:09 @*.**@*.>; @.>; 主题: 回复：[apache/dubbo] cluster = ClusterRules.FAIL_BACK出现java.lang.NullPointerException .GroupServiceKeyCache.getServiceKey()异常。 (#8431)

故意测试超时啊  网络上很容易超时  但是出现的错误却不应该这样   我感觉是bug  

发自我的iPhone

------------------ 原始邮件 ------------------ 发件人: 灼华 @.> 发送时间: 2021年8月6日 10:55 收件人: apache/dubbo @.> 抄送: startjava @.>, Author @.> 主题: 回复：[apache/dubbo] cluster = ClusterRules.FAIL_BACK出现java.lang.NullPointerException .GroupServiceKeyCache.getServiceKey()异常。 (#8431)

你这是调用超时了吧，默认超时时间1s，你服务端睡了10s

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startjava commented 3 years ago

按理说，超时后FAIL_BACK重发，如果再次进入超时的提供者，结果还是超时，但为什么却出现空指针异常呢？这很明显内部代码有问题。

另外超时后FAIL_BACK重发到非超时正常的提供者时，还会出现空指针异常，导致根本不能正常的消费，这是很严重的问题。

startjava commented 3 years ago

@BurningCN 感谢 。

startjava commented 3 years ago

Dubbo 3.0.1 version

startjava commented 3 years ago

今天测试，又不出java.lang.NullPointerException .GroupServiceKeyCache.getServiceKey()异常了，close了。